Turns out, Same sex relationships happen in penguins...
Gay penguins raise newly hatched chick at New York zoo
Elmer and Lima, male residents of the Rosamond Gifford Zoo in Syracuse, had been incubating an egg laid by one of the zoo’s female penguins.
...
Zoo Director Ted Fox said not all penguin pairs are good at incubating eggs. “It takes practice,” he said in a statement.
The zoo decided to swap a dummy egg with a viable embryo laid by female penguin Poquita and her mate, Vente, in late December. Elmer and Lima were given a chance to incubate the egg. After a few weeks, the egg successfully hatched, and the pair have been brooding (warming) and feeding the chick since.
“Some pairs, when given a dummy egg, will sit on the nest but leave the egg to the side and not incubate it correctly, or they’ll fight for who is going to sit on it when,” Fox said. “That’s how we evaluate who will be good foster parents, and Elmer and Lima were exemplary in every aspect of egg care.”